The Gateworks System Controller on Ventana boards has the ability to disable the board's primary power supply until the RTC hits a specific time. When sleeping a button-down event on the GSC user pushbutton will wake the board before it's wake time has been reached. This feature is referred to as GSC sleep.
Add a command to invoke sleep mode for a specified number of seconds.
Signed-off-by: Tim Harvey tharvey@gateworks.com --- board/gateworks/gw_ventana/gsc.c | 46 +++++++++++++++++++++++++++++++++++++++- 1 file changed, 45 insertions(+), 1 deletion(-)
diff --git a/board/gateworks/gw_ventana/gsc.c b/board/gateworks/gw_ventana/gsc.c index 4f26bfd..2555824 100644 --- a/board/gateworks/gw_ventana/gsc.c +++ b/board/gateworks/gw_ventana/gsc.c @@ -160,6 +160,48 @@ int gsc_boot_wd_disable(void) }
#ifdef CONFIG_CMD_GSC +static int do_gsc_sleep(cmd_tbl_t *cmdtp, int flag, int argc, + char * const argv[]) +{ + unsigned char reg; + unsigned long secs = 0; + + if (argc < 2) + return CMD_RET_USAGE; + + secs = simple_strtoul(argv[1], NULL, 10); + printf("GSC Sleeping for %ld seconds\n", secs); + + i2c_set_bus_num(0); + reg = (secs >> 24) & 0xff; + if (gsc_i2c_write(GSC_SC_ADDR, 9, 1, ®, 1)) + goto error; + reg = (secs >> 16) & 0xff; + if (gsc_i2c_write(GSC_SC_ADDR, 8, 1, ®, 1)) + goto error; + reg = (secs >> 8) & 0xff; + if (gsc_i2c_write(GSC_SC_ADDR, 7, 1, ®, 1)) + goto error; + reg = secs & 0xff; + if (gsc_i2c_write(GSC_SC_ADDR, 6, 1, ®, 1)) + goto error; + if (gsc_i2c_read(GSC_SC_ADDR, GSC_SC_CTRL1, 1, ®, 1)) + goto error; + reg |= (1 << 2); + if (gsc_i2c_write(GSC_SC_ADDR, GSC_SC_CTRL1, 1, ®, 1)) + goto error; + reg &= ~(1 << 2); + reg |= 0x3; + if (gsc_i2c_write(GSC_SC_ADDR, GSC_SC_CTRL1, 1, ®, 1)) + goto error; + + return CMD_RET_SUCCESS; + +error: + printf("i2c error\n"); + return CMD_RET_FAILURE; +} + static int do_gsc_wd(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { unsigned char reg; @@ -206,13 +248,15 @@ static int do_gsc(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
if (strcasecmp(argv[1], "wd") == 0) return do_gsc_wd(cmdtp, flag, --argc, ++argv); + else if (strcasecmp(argv[1], "sleep") == 0) + return do_gsc_sleep(cmdtp, flag, --argc, ++argv);
return CMD_RET_USAGE; }
U_BOOT_CMD( gsc, 4, 1, do_gsc, "GSC configuration", - "[wd enable [30|60]]|[wd disable]\n" + "[wd enable [30|60]]|[wd disable]|[sleep <secs>]\n" );
#endif /* CONFIG_CMD_GSC */